Making a balance that interfaces with the photosynq app - where to connect outputs on Multispeq board?

Farmers + Ag Extension

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Steven Vanek

submitted about 2 years ago.

Hi, I think this might be for Greg or Dan -- I have a little balance rig with a load cell and amplifier that has a nice linear output 0 to 50 g which outputs to ~0 to 4.25 volts -- I can increase the range to 300g by changing a gain resistor. Where could I hook this on the multispeq arduino board? I would need ground, 5V power, and the sensor output. I got this off an arduino instructables page so pretty confident it should work. This would allow integrating a weight measurement into a protocol or just running a preweighing of soils protocol.

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Dan TerAvest

submitted about 2 years ago.

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Steve, Look at the attached to see the pin for 5V power and ground. Hook up the sensor output to pin 40 (A14 on the attached image).

Integrating the analog read from the load cell in the protocol would look like this:

environmental":[["analog_read",0,40]

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Steven Vanek

submitted about 2 years ago.

Here's the webpage with the schematic of the load cell and amplifier. It looks like it hooks to "arduino analog 0"

http://www.instructables.com/id/Arduino-Load-Cell-Scale/step2/The-Amplifier/

Steve